<!DOCTYPE html>
 <head>
  <title>网页标题</title>
 </head>
 <body>
    <form action="">
    昵称:<input type="text" placeholder="请输入你的昵称"></input><br><br>
    密码:<input type="password"/><br><br>
    性别:<input type="radio" name="sex" checked>男</input>
        <input type="radio" name="sex">女</input><br><br>
    爱好：<input type="checkbox" id="one"><label for="one">敲代码</label></input>
        <label><input type="checkbox" checked>熬夜</input></label>
        <input type="checkbox" checked>掉头发</input><br><br>
    <input type="file" multiple>选择文件</input><br>
    <input type="submit"/>
    <input type="reset"/>
    <input type="button"/>
    </form>
 </body>
</html>